Hi Ian,
Thanks for contacting us and choosing our product!
About your problem,
Please go to mod_jux_social_gallery.xml(modules\mod_jux_social_gallery)
remove line 80
<updateservers>
<server type="extension" priority="1" name="JUX Social Gallery">
www.joomlaux.com/updates/extensions/mod_...l_gallery_update.xml
</server>
</updateservers>
Thanks!